I have the Delta version, the PC model is identical. Either saw can be
offered with a carbide blade as an upgrade from time to time. The list
prices are the same but the discounts on the saws vary from time to
time. All things being equal I would go for whichever is cheapest after
whatever discounts apply to you and ditch the blade it came with
regardless of whether it is carbide or whatever.

The saw usually comes with an extension fence & table to the left of
the blade. The extra room is handy if you don't have a mitre saw table
(which I don't yet) but otherwise its not much point.

Mine came with the carbide blade but the cuts it made never compared to
the ones I got on my table saw until I replaced the Delta blade with a
Freud Diablo. After that the cuts are almost as good as I get on my
table saw with a Woodworker II.

The laser lines help speed up a lot of tasks, the first thing I used it
on was building a set of handrails for some outside steps. Saved
several hours in marking &ct. If I need to do something that is really
accurate I do some test cuts to work out exactly where the blade is
relative to the kerf but thats only necessary if you have to be
accurate to better than 1/16 and the thickness of the laser kerf starts
to matter.

If you have to hold the laser switch in to operate then the saw is
broken. I leave mine on all the time so that it serves a double purpose
telling me that the saw is powered.